<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/vue.js"></script>
</head>

<body>
    <div id="demo">
        <h2>人员列表</h2>
        <input type="text" v-model='keyWord'>
        <ul>
            <li v-for='p in newPersonsArr'>
                {{p.name}}-{{p.age}}-{{p.gender}}
            </li>
        </ul>
    </div>
    <script>
        Vue.config.productionTip = false;

        new Vue({
            el: '#demo',
            data: {
                keyWord: '',
                persons: [
                    { id: '001', name: '马冬梅', age: 19, gender: '女' },
                    { id: '002', name: '周冬雨', age: 20, gender: '女' },
                    { id: '003', name: '周杰伦', age: 21, gender: '男' },
                    { id: '004', name: '帅邓伦', age: 22, gender: '男' },
                ],
                newPersonsArr: []
            },
            watch: {
                keyWord: {
                    //indexOf方法匹配空字符串时返回0,不满足44行筛选条件,因此返回所有值
                    //immediate设置第一次页面加载即执行,所以第一次加载会将所有数据全部呈现
                    immediate:true,
                    handler(val) {
                        let newPerson = this.persons.filter((person) => {
                            return person.name.indexOf(val) !== -1
                        });
                        this.newPersonsArr = newPerson
                    }
                }
            }
        })
    </script>
</body>

</html>